Re: [boost] Suggestion to lexical_cast library

Márcio Gil wrote:

I suggest this add on lexical_cast library: a lexical_cast_def function,

string source; int x = lexical_cast_def<int>( source, 0 );

In opposite of:

string source; int x; try { x = lexical_cast<int>( source ); } catch(...) { x = 0; }

This wouldn't only be useful to lexical_cast. What about a more generic utility? template<typename F, typename T> T call_default(F f, T t) { try { return f(); } catch { return t; } } Unfortunately, this requires usage of function objects, and lambdas are not so popular. Maybe one can do it with actual C++ expressions using macros.